will likely be named `sdX` where `X` is a letter. The full name of your usb
device is `/dev/sdX`.
-Be absolutely that you have correctly identified the USB device at this point.
-If you have misidentified it, you will cause irreparable loss of data.
+Be absolutely certain that you have correctly identified the USB device at this
+point. If you have misidentified it, you will cause irreparable loss of data.
Once identified, make sure you unmount or eject all partitions on the usb
device.